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/*
* ser2net - A program for allowing telnet connection to serial ports
* Copyright (C) 2001-2020 Corey Minyard <minyard@acm.org>
*
* SPDX-License-Identifier: GPL-2.0-only
*
* In addition, as a special exception, the copyright holders of
* ser2net give you permission to combine ser2net with free software
* programs or libraries that are released under the GNU LGPL and
* with code included in the standard release of OpenSSL under the
* OpenSSL license (or modified versions of such code, with unchanged
* license). You may copy and distribute such a system following the
* terms of the GNU GPL for ser2net and the licenses of the other code
* concerned, provided that you include the source code of that
* other code when and as the GNU GPL requires distribution of source
* code.
*
* Note that people who make modified versions of ser2net are not
* obligated to grant this special exception for their modified
* versions; it is their choice whether to do so. The GNU General
* Public License gives permission to release a modified version
* without this exception; this exception also makes it possible to
* release a modified version which carries forward this exception.
*/
#include <string.h>
#include <stdlib.h>
#include <gensio/gensio.h>
#include "ser2net.h"
#include "defaults.h"
#define PORT_BUFSIZE 64 /* Default data transfer buffer size */
struct default_data
{
const char *name;
enum gensio_default_type type;
int min;
int max;
struct {
int intval;
const char *strval;
} def;
struct gensio_enum_val *enums;
};
static struct default_data defaults[] = {
/* All port types */
{ "telnet-brk-on-sync",GENSIO_DEFAULT_BOOL,.def.intval = 0 },
{ "kickolduser", GENSIO_DEFAULT_BOOL, .def.intval = 0 },
{ "timeout-on-os-queue", GENSIO_DEFAULT_BOOL, .def.intval = 0 },
{ "chardelay", GENSIO_DEFAULT_BOOL, .def.intval = 1 },
{ "chardelay-scale",GENSIO_DEFAULT_INT, .min = 1, .max = 1000,
.def.intval = 20 },
{ "chardelay-min", GENSIO_DEFAULT_INT, .min = 1, .max = 100000,
.def.intval = 1000 },
{ "chardelay-max", GENSIO_DEFAULT_INT, .min = 1, .max = 1000000,
.def.intval = 20000 },
{ "dev-to-net-bufsize", GENSIO_DEFAULT_INT,.min = 1, .max = 65536,
.def.intval = PORT_BUFSIZE },
{ "net-to-dev-bufsize", GENSIO_DEFAULT_INT,.min = 1, .max = 65536,
.def.intval = PORT_BUFSIZE },
{ "max-connections", GENSIO_DEFAULT_INT, .min=1, .max=65536,
.def.intval = 1 },
{ "connector-retry-time", GENSIO_DEFAULT_INT, .min=1, .max=10000000,
.def.intval = 10 },
{ "accepter-retry-time", GENSIO_DEFAULT_INT, .min=1, .max=10000000,
.def.intval = 10 },
{ "remaddr", GENSIO_DEFAULT_STR, .def.strval = NULL },
{ "connback", GENSIO_DEFAULT_STR, .def.strval = NULL },
{ "authdir", GENSIO_DEFAULT_STR, .def.strval = NULL },
{ "authdir-admin", GENSIO_DEFAULT_STR, .def.strval = NULL },
{ "pamauth", GENSIO_DEFAULT_STR, .def.strval = NULL },
{ "pamauth-admin", GENSIO_DEFAULT_STR, .def.strval = NULL },
{ "allowed-users", GENSIO_DEFAULT_STR, .def.strval = NULL },
{ "signature", GENSIO_DEFAULT_STR, .def.strval = "ser2net" },
{ "openstr", GENSIO_DEFAULT_STR, .def.strval = NULL },
{ "closestr", GENSIO_DEFAULT_STR, .def.strval = NULL },
{ "closeon", GENSIO_DEFAULT_STR, .def.strval = NULL },
{ "banner", GENSIO_DEFAULT_STR, .def.strval = NULL },
{ "sendon", GENSIO_DEFAULT_STR, .def.strval = NULL },
{ "mdns", GENSIO_DEFAULT_BOOL, .def.intval = 0 },
{ "mdns-sysattrs", GENSIO_DEFAULT_BOOL, .def.intval = 0 },
{ "mdns-type", GENSIO_DEFAULT_STR, .def.strval = NULL },
{ "mdns-domain", GENSIO_DEFAULT_STR, .def.strval = NULL },
{ "mdns-host", GENSIO_DEFAULT_STR, .def.strval = NULL },
{ "mdns-interface", GENSIO_DEFAULT_INT, .min=-1, .max=100000,
.def.intval = -1},
{ NULL }
};
static int
setup_ser2net_defaults(void)
{
unsigned int i;
int err;
for (i = 0; defaults[i].name; i++) {
err = gensio_set_default(so, NULL, defaults[i].name,
defaults[i].def.strval,
defaults[i].def.intval);
if (err)
return err;
}
err = gensio_set_default(so, NULL, "authdir", authdir, 0);
if (err)
return err;
err = gensio_set_default(so, NULL, "authdir-admin", admin_authdir, 0);
if (err)
return err;
err = gensio_set_default(so, "ssl", "key", keyfile, 0);
if (err)
return err;
err = gensio_set_default(so, "ssl", "cert", certfile, 0);
if (err)
return err;
#ifdef gensio_version_ge /* gensio_version_ge came in with 2.2.3 and 2.3.0 */
/* Print out a message on the socket if tcpd denies a connection. */
err = gensio_set_default(so, "tcp", "tcpd", "print", 0);
/* If GE_NOTFOUND is returned, that means gensio doesn't have tcpd. */
if (err && err != GE_NOTFOUND)
return err;
#endif
return 0;
}
int
setup_defaults(void)
{
unsigned int i;
int err;
static bool defaults_added = false;
if (defaults_added) {
gensio_reset_defaults(so);
} else {
for (i = 0; defaults[i].name; i++) {
err = gensio_add_default(so, defaults[i].name,
defaults[i].type, defaults[i].def.strval,
defaults[i].def.intval, defaults[i].min,
defaults[i].max, defaults[i].enums);
if (err && err != GE_EXISTS)
return err;
}
defaults_added = true;
}
return setup_ser2net_defaults();
}
int
find_default_int(const char *name)
{
int err, val;
err = gensio_get_default(so, "ser2net", name, false, GENSIO_DEFAULT_INT,
NULL, &val);
if (err)
abort();
return val;
}
bool
find_default_bool(const char *name)
{
int err;
int val;
err = gensio_get_default(so, "ser2net", name, false, GENSIO_DEFAULT_BOOL,
NULL, &val);
if (err)
abort();
return val;
}
int
find_default_str(const char *name, char **rstr)
{
int err;
char *val;
char *newstr = NULL;
err = gensio_get_default(so, "ser2net", name, false, GENSIO_DEFAULT_STR,
&val, NULL);
if (err)
abort();
if (val) {
newstr = strdup(val);
so->free(so, val);
if (!newstr)
return GE_NOMEM;
}
*rstr = newstr;
return 0;
}
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